.courses-warp {
    width: 1200px;
    margin: 50px auto;
}

.courses-warp input {
    height: 28px;
    line-height: 28px;
    font-size: 14px;
    border: 1px solid #848484;
    width: 300px;
    text-indent: 10px;
    border-radius: 3px;
}

.courses-warp input::placeholder {
    color: #848484;
}

.course-tab-list {
    height: 50px;
    line-height: 50px;
}

.clearfix::after {
    content: "";
    clear: both;
}

.course-tab-list .tab-item {
    float: left;
    margin-right: 20px;
}

.course-tab-list .current {
    color: #288ff0;
}

.couse-card-list {
    display: flex;
    flex-flow: wrap;
}

.couse-card-list .card-item {
    position: relative;
    width: 220px;
    height: 224px;
    padding: 7px 7px 10px;
    margin-bottom: 20px;
    margin-right: 10px;
    border: 1px solid transparent;
}

.couse-card-list .card-item:hover {
    border: 1px solid #eee;
}

.couse-card-list .card-item .item-img img {
    width: 220px;
}

.couse-card-list .card-item .tt-lk {
    font-size: 14px;
    color: #333;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-box-orient: vertical;
}

.couse-card-list .card-item .item-line {
    position: absolute;
    bottom: 10px;
    left: 10px;
}

.couse-card-list .card-item .item-line .free {
    color: #f4621f;
}

.couse-card-list .card-item .item-line .item-info {
    color: #999;
    margin-left: 10px;
    font-size: 12px;
}